Can you tell me how much ____ to visit these places of inter

Can you tell me how much ____ to visit these places of interest?
1,will it cost 2,it costs
为什么不能用will
There is no difference between the two words.I can`t decide____
1,which to choose 2,what to choose
为什么不能用what
the house _____ we live is not large.
1,which 2,where
怎样辨别有没有状语?
he doesn`t kown if it______tomorrow.If it ____,he won`t go out.
1,will rain ,rains 2,will rain ,will rain